Intersomatic spine implant having anchoring elements
First Claim
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1. An intersomatic spine implant comprising:
- a body having at least one anchoring element movable relative to the body to project from top and bottom contact faces of the body for contacting a vertebra; and
at least one cam slidable relative to the body for displacing the anchoring element relative to the body through the faces by the effect of a ramp engaging the anchoring element, the cam and the anchoring element arranged so that the cam forcibly extends and retracts the anchoring element relative to the body, the cam having an element thereon for engaging the anchoring element to forcibly retract the anchoring element from the vertebra, the anchoring element having an enlarged portion for engaging said element on said cam, and the retraction element on said cam being a slot adapted to receive said enlarged portion of said anchoring element, wherein said slot extends radially outwardly relative to said cam axis, each slot having a first and second portion radially displaced from said cam axis wherein said first portion is at a distance which causes said anchoring element to move into engagement with said vertebra and said second portion is at a distance which causes said anchoring element to move out of engagement with said vertebra.
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Abstract
The intersomatic spine implant comprises a body, at least one anchoring element movable relative to the body to project from a contact face of the body making contact with a vertebra, and at least one cam slidable relative to the body and suitable for displacing the anchoring element relative to the body by the effect of a ramp engaging the anchoring element. The cam and the anchoring element are arranged so that the cam moves the anchoring element in two opposite displacement directions.
399 Citations
21 Claims
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1. An intersomatic spine implant comprising:
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a body having at least one anchoring element movable relative to the body to project from top and bottom contact faces of the body for contacting a vertebra; and
at least one cam slidable relative to the body for displacing the anchoring element relative to the body through the faces by the effect of a ramp engaging the anchoring element, the cam and the anchoring element arranged so that the cam forcibly extends and retracts the anchoring element relative to the body, the cam having an element thereon for engaging the anchoring element to forcibly retract the anchoring element from the vertebra, the anchoring element having an enlarged portion for engaging said element on said cam, and the retraction element on said cam being a slot adapted to receive said enlarged portion of said anchoring element, wherein said slot extends radially outwardly relative to said cam axis, each slot having a first and second portion radially displaced from said cam axis wherein said first portion is at a distance which causes said anchoring element to move into engagement with said vertebra and said second portion is at a distance which causes said anchoring element to move out of engagement with said vertebra. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A spinal implant comprising:
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a body having an internal opening therein and first and second external faces for contacting first and second vertebra respectively, said faces each having at least one channel therethrough;
a projection element slideable through each of said at least one channel with respect to said body extending beyond the first and second faces of said body adapted for engagement with said first and second vertebrae; and
a cam received within said internal opening for acting on said projection element to selectively move said projection element into and out of engagement with said vertebra, said cam having a retraction element thereon for engaging said projection element to retract said projection element from said vertebra, said projection element having an enlarged portion for engaging said retraction element on said cam, and said retraction element on said cam having a slot adapted to receive said enlarged portion of said projection element, wherein said slot extends radially outwardly relative to said cam axis, each slot having a first and second portion radially displaced from said cam axis wherein said first portion is at a distance which causes said projection element to move into engagement with said vertebra and said second portion is at a distance which causes said projection element to move out of engagement with said vertebra. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification